نتایج جستجو برای: nanoporous materials

تعداد نتایج: 440024  

2013
Romain Vermorel Gilles Pijaudier - Cabot Bruno Mendiboure

1.1 Abstract Poromechanics offers a consistent theoretical framework for describing the mechanical response of porous solids. When dealing with fully saturated nanoporous materials, which exhibit pores of the nanometer size, additional effects due to adsorption and confinement of the fluid molecules in the smallest pores must be accounted for. From the mechanical point of view, these phenomena ...

2004
Randall Q. Snurr Joseph T. Hupp SonBinh T. Nguyen

New materials spur new technologies. Nanoporous metalorganic materials — “soft materials”analogues of zeolites, but with all of the chemical diversity of carbon compounds — may be compelling examples of this path from materials to technologies. Research teams investigating this new class of materials are trying to develop adsorbents and membranes that will revolutionize small-molecule separatio...

2017
Yongjin Lee Senja D. Barthel Paweł Dłotko S. Mohamad Moosavi Kathryn Hess Berend Smit

In most applications of nanoporous materials the pore structure is as important as the chemical composition as a determinant of performance. For example, one can alter performance in applications like carbon capture or methane storage by orders of magnitude by only modifying the pore structure. For these applications it is therefore important to identify the optimal pore geometry and use this i...

Journal: :ACS applied materials & interfaces 2011
Joshua Schrier

The physisorption of gases on surfaces depends on the electrostatic and dispersion interactions with adsorbates. The former can be tuned by introducing charge variations in the material, and the latter can be tuned by chemical substitution. Using atomistic Monte Carlo calculations, the Henry's law constants, and isosteric heats of adsorption of CH(4), CO(2), N(2), O(2), H(2)S, SO(2), and H(2)O ...

2010
Roger J. Narayan Shashishekar P. Adiga Michael J. Pellin Larry A. Curtiss Alexander J. Hryn Shane Stafslien Bret Chisholm Chun-Che Shih Chun-Ming Shih Shing-Jong Lin Yea-Yang Su Chunming Jin Junping Zhang Nancy A. Monteiro-Riviere Jeffrey W. Elam

Nanoporous alumina membranes exhibit high pore densities, well-controlled and uniform pore sizes, as well as straight pores. Owing to these unusual properties, nanoporous alumina membranes are currently being considered for use in implantable sensor membranes and water purification membranes. Atomic layer deposition is a thin-film growth process that may be used to modify the pore size in a nan...

Journal: :Nature materials 2013
Michaël Deschamps Edouard Gilbert Philippe Azais Encarnación Raymundo-Piñero Mohammed Ramzi Ammar Patrick Simon Dominique Massiot François Béguin

Supercapacitors are electrochemical energy-storage devices that exploit the electrostatic interaction between high-surface-area nanoporous electrodes and electrolyte ions. Insight into the molecular mechanisms at work inside supercapacitor carbon electrodes is obtained with (13)C and (11)B ex situ magic-angle spinning nuclear magnetic resonance (MAS-NMR). In activated carbons soaked with an ele...

2015
Alexander Lauerer Tomas Binder Christian Chmelik Erich Miersemann Jürgen Haase Douglas M. Ruthven Jörg Kärger

Under certain conditions, during binary mixture adsorption in nanoporous hosts, the concentration of one component may temporarily exceed its equilibrium value. This implies that, in contrast to Fick's Law, molecules must diffuse in the direction of increasing rather than decreasing concentration. Although this phenomenon of 'overshooting' has been observed previously, it is only recently, usin...

2009
Pierluigi Pilla Andrea Cusano Antonello Cutolo Michele Giordano Giuseppe Mensitieri Paola Rizzo Luigi Sanguigno Vincenzo Venditto Gaetano Guerra

Chemical sensors are generally based on the integration of suitable sensitive layers and transducing mechanisms. Although inorganic porous materials can be effective, there is significant interest in the use of polymeric materials because of their easy fabrication process, lower costs and mechanical flexibility. However, porous polymeric absorbents are generally amorphous and hence present poor...

2010
Cristina Romero Juan C. Noyola Ulises Santiago Renela M. Valladares Alexander Valladares Ariel A. Valladares

We review our approach to the generation of nanoporous materials, both semiconducting and metallic, which leads to the existence of nanopores within the bulk structure. This method, which we have named as the expanding lattice method, is a novel transferable approach which consists first of constructing crystalline supercells with a large number of atoms and a density close to the real value an...

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